His stats are: 38/3/12/29 vpip/pfr/Af/hands.
1)On flop i decided to cbet for value and against his push i folded without any info.After that he shows me that he has KJ so i take the note for the future.
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Against a AF 12 guy std. stack-off. Might have FD's, many weaker kings and stuff. Especially with BDFD I'd call here and expect to be ahead most of the time, as fish usually love to slowplay REAL hands.